EVALUATION OF HEALING IN ASPHALT CONCRETE BY MEANS OF THE THEORY OF NONLINEAR VISCOELASTICITY

摘要: The literature review demonstrates that a mechanism exists enhances fatigue life of asphalt concrete mixtures as rest periods are introduced in testing. Results presented and analyzed from controlled displacement, cyclic crack propagation tests which were randomly introduced. results demonstrate "healing" does indeed result the requirement greater level work to drive following period than was required before effort identify chemical healing microcrack process zone is confounded by concomitant occurrence viscoelastic relaxation. Schapery's correspondence principle nonlinear media successfully used separate relaxation healing. Application procedure separating out yields method quantify microcracks preceding macrocrack. Chemical function quantified using index based on pseudo-energy-density. This for three asphalts varied composition.